/*
 * Copyright (C) 2010 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.zxing.client.android;

import android.graphics.Bitmap;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.PlanarYUVLuminanceSource;
import com.google.zxing.ReaderException;
import com.google.zxing.Result;
import com.google.zxing.ResultPoint;
import com.google.zxing.client.android.process.SplitImage;
import com.google.zxing.client.homework.HomeworkInfo;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.mumars.MMQRCodeReader;
import com.google.zxing.qrcode.QRCodeReader;

import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.util.Log;

import java.io.ByteArrayOutputStream;
import java.util.Map;

final class DecodeHandler extends Handler {

  private static final String TAG = DecodeHandler.class.getSimpleName();

  private final CaptureActivity activity;
  private final QRCodeReader qrCodeReader;
  private boolean running = true;

  DecodeHandler(CaptureActivity activity, Map<DecodeHintType,Object> hints) {
//    multiFormatReader = new MultiFormatReader();
//    multiFormatReader.setHints(hints);
    qrCodeReader = new QRCodeReader();
    this.activity = activity;
  }

  @Override
  public void handleMessage(Message message) {
    if (message == null || !running) {
      return;
    }
    switch (message.what) {
      case R.id.decode:
        decode((byte[]) message.obj, message.arg1, message.arg2);
        break;
      case R.id.quit:
        running = false;
        Looper.myLooper().quit();
        break;
    }
  }

  /**
   * Decode the data within the viewfinder rectangle, and time how long it took. For efficiency,
   * reuse the same reader objects from one decode to the next.
   *
   * @param data   The YUV preview frame.
   * @param width  The width of the preview frame.
   * @param height The height of the preview frame.
   */
  private void decode(byte[] data, int width, int height) {
    long start = System.currentTimeMillis();
    //add by tancolo
    if (width < height) {
      // portrait
      byte[] rotatedData = new byte[data.length];
      for (int x = 0; x < width; x++) {
        for (int y = 0; y < height; y++)
          rotatedData[y * width + width - x - 1] = data[y + x * height];
      }
      data = rotatedData;
    }
    //end add
    Result rawResult = null;
    Result mmRawResult = null;
    PlanarYUVLuminanceSource source = activity.getCameraManager().buildLuminanceSource(data, width, height);
    HybridBinarizer binarizer = new HybridBinarizer(source);
    MMQRCodeReader okCodeReader = new MMQRCodeReader();
    BinaryBitmap bitmap = new BinaryBitmap(binarizer);
    if (source != null) {
      try {
        rawResult = qrCodeReader.decode(bitmap);
      } catch (ReaderException re) {
        // continue
      } finally {
        qrCodeReader.reset();
      }

    }

    Handler handler = activity.getHandler();
    if (rawResult != null) {
      // Don't log the barcode contents for security.
      long end = System.currentTimeMillis();
      Log.d(TAG, "Found barcode in " + (end - start) + " ms");
      start = end;

      try {
        mmRawResult = okCodeReader.decode(bitmap);
      }catch (ReaderException e) {
        //continue
      }finally {
        okCodeReader.reset();
      }

      boolean isGetFeaturePoints = false;
      if (mmRawResult != null) {
        int size = mmRawResult.getResultPoints().length;
        end = System.currentTimeMillis();
        Log.d(TAG, "Found 21112 in " + (end - start) + " ms ");
//        rawResult.addResultPoints(mmRawResult.getResultPoints());
        isGetFeaturePoints = checkPoints( rawResult.getResultPoints(), mmRawResult.getResultPoints());
//      }else {
//        mmRawResult = rawResult;
//        isGetFeaturePoints = true;
      }

      if (handler != null) {
        if (isGetFeaturePoints) {
          SplitImage splitImg = new SplitImage(activity, bitmap, data, width, height, rawResult, mmRawResult);

          Message message = Message.obtain(handler, R.id.decode_succeeded, rawResult);
          Bundle bundle = new Bundle();
          bundleThumbnail(source, bundle);
          message.setData(bundle);
          message.sendToTarget();

//          HomeworkInfo homework = splitImg.splitImage();
//          activity.getInfoOver(homework);

        }else {
          Message message = Message.obtain(handler, R.id.decode_failed);
          message.sendToTarget();
        }
      }
    } else {
      if (handler != null) {
        Message message = Message.obtain(handler, R.id.decode_failed);
        message.sendToTarget();
      }
    }
  }

  private boolean checkPoints(ResultPoint[] barcode, ResultPoint[] mumars){
    double distance_0_1 = distance(barcode[0], barcode[1]);
    for (ResultPoint pos:mumars
         ) {
      if (distance(pos, barcode[0]) < 4*distance_0_1){
        return false;
      }
    }
    return true;
  }

  private double distance( ResultPoint pos1, ResultPoint pos2){
    float xDis = Math.abs( pos1.getX() - pos2.getX() );
    float yDis = Math.abs( pos1.getY() - pos2.getY() );
    return Math.sqrt( xDis*xDis + yDis*yDis );
  }
  
  private static void bundleThumbnail(PlanarYUVLuminanceSource source, Bundle bundle) {
    int[] pixels = source.renderThumbnail();
    int width = source.getThumbnailWidth();
    int height = source.getThumbnailHeight();
    Bitmap bitmap = Bitmap.createBitmap(pixels, 0, width, width, height, Bitmap.Config.ARGB_8888);
    ByteArrayOutputStream out = new ByteArrayOutputStream();    
    bitmap.compress(Bitmap.CompressFormat.JPEG, 50, out);
    bundle.putByteArray(DecodeThread.BARCODE_BITMAP, out.toByteArray());
    bundle.putFloat(DecodeThread.BARCODE_SCALED_FACTOR, (float) width / source.getWidth());
  }

}
